Various circuits & links.
Strongly recommended.
Many  from EDN -  most from 1990's.
Seems to have chosen a better than average collection of "good" ones.
Jim Williams is a contributor in at least one case !!!! Unfair ! :-).

http://www.audioscientific.com/Circuits%20-%20Schematics%20&%20Tutorials_10=
0.htm


I liked the retrospectively obvious addition of a capacitor in the middle
of a classic cascode* circuit, thus enabling the whole circuit to run on 1
Volt when the original wouldn't! .

They also have a topographically reworked but identical version of "my" 1
cell LED driver circuit (classic 2 transistor flasher from yore with an
inductor added to give it N volt output, which I think I published in 2000
or 2001. Theirs dated 2002. While I have little doubt that Noah used the
circuit to power deck lights, I have never seen an earlier mention than
mine (so far) - and also have never seen anyone attribute it to me either
:-).


         Russell McMahon

* Not a typo - cascode is the correct name.
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